On Friday 25 May 2007 02:05:47 David Chinner wrote:

"-o ro,norecovery" will allow you to mount the filesystem and get any
uncorrupted data off it.

You still may get shutdowns if you trip across corrupted metadata in
the filesystem, though.

This filesystem is completely dead.

hq:~# mount -o ro,norecovery /dev/loop1 /mnt/r5
May 28 13:41:50 hq kernel: Mounting filesystem "loop1" in no-recovery mode.  
Filesystem will be inconsistent.
May 28 13:41:50 hq kernel: XFS: failed to read root inode

hq:~# xfs_db /dev/loop1
xfs_db: cannot read root inode (22)
xfs_db: cannot read realtime bitmap inode (22)
Segmentation fault

hq:~# strace xfs_db /dev/loop1
_llseek(4, 0, [0], SEEK_SET)            = 0
read(4, "XFSB\0\0\20\0\0\0\0\0\6\374\253\0\0\0\0\0\0\0\0\0\0\0\0"..., 512) = 
512
pread(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512, 
480141901312) = 512
pread(4, "\30G$L\203\33OE \256=\207@\340\264O\"\324\2074DY\323\6"..., 8192, 
131072) = 8192
write(2, "xfs_db: cannot read root inode ("..., 36xfs_db: cannot read root 
inode (22)
) = 36
pread(4, "\30G$L\203\33OE \256=\207@\340\264O\"\324\2074DY\323\6"..., 8192, 
131072) = 8192
write(2, "xfs_db: cannot read realtime bit"..., 47xfs_db: cannot read realtime 
bitmap inode (22)
) = 47

--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

Browsing with hexdump -C, seems like a part of a PDF file is at 128Kb, on the 
place of the root inode. :(


--
 d